<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      display: grid;
      /* grid-template-columns: 200px 1fr; */
      grid-template-columns: 200px auto;
      grid-template-rows: 400px;
    }
    aside {
      background-color: aqua;
    }
    main {
      background-color: bisque;
    }
  </style>
</head>
<body>
  <div class="container">
    <aside>左侧导航栏</aside>
    <main>右侧内容展示</main>
  </div>
</body>
</html>